Result
This page has no server side at all. The table you paste is parsed by JavaScript inside your own browser, the chart is drawn on a canvas element on your machine, and the export file is assembled locally. Nothing is uploaded, stored or written to any log. You can disconnect from the network after the page has loaded and everything will still work — which is the simplest way to verify the claim yourself.
Facts and limits of this method
| Formula | Per mille = percent × 10 |
|---|---|
| 1 percent (%) | 10 per mille |
| 1 per mille (‰) | 0.1 percent |
| Common uses | Blood alcohol concentration, water salinity, measurement precision |
When it misleads you
- The 1 % = 10 ‰ ratio is an exact definition by the very meaning of the units (both express a fraction of a whole, differing only in scale), so the converter introduces no error of its own beyond the chosen rounding precision.
- A small percentage (0.05 %, for example) becomes a much more readable number once converted to per mille (0.5 ‰) — that's exactly why per mille is the customary unit in tasks like measuring blood alcohol.
- At "0 — whole number" precision, the fractional part of the result is dropped by rounding rules, not truncation.
- The input accepts both a period and a comma as a decimal separator.
How it is calculated
Percent is one part per hundred of a whole, per mille is one part per thousand. Since a hundredth is ten times larger than a thousandth, converting percent to per mille is multiplying by 10.
The entered value in percent is multiplied by 10 to get per mille.
The reverse ratio — 0.1 percent in one per mille — is shown in a separate row to quickly check the conversion direction.
The calculation updates instantly on every change to the input field or precision.
Questions and answers
Why convert percent to per mille if it's just multiplying by 10?
To avoid doing it in your head and making a mistake with very small percentages — especially when the result needs to be in per mille for a specific form, like a medical protocol.
How many per mille is 0.05 %?
0.5 ‰ — multiply 0.05 by 10.
Where is per mille more convenient than percent?
Anywhere percentages come out awkwardly small: blood alcohol concentration, seawater salinity, precision-measurement tolerances.
Is my data sent anywhere?
No, the whole calculation runs in your browser.